Gas-engine



`1. SCHOLTZ. GAS ENGINE.

APPLICATION FILED AUG. I, 1919.

Patented Nov. 1,1921.

` 1. ScHoLz.

GAS ENGINE.

APPLICATION FlLED AUG. l' 1919.

SHEETS-SHEET 2.

1,395,658. Patented Nov. 1, 1921.

Inverzr l,/lol'nz S0/ ZOUK 1. SCHOLTZ.

GS ENGINE.

APPLICATION FILED Auw.. 1919.

1,395,658. Patented Nov. 1,` 1921.

UNITED STATES PATENT OFFICE.

JOHN SCHOLTZ, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR OF ONE-THIRD TO STANLEY A. BROZA, OF ORELAND, PENNSYLVANIA, AND ONE-THIRD TO GUSTAVE W. lSUNDAY, OF PHILADELPHIA, PENNSYLVANIA. A f

GAS-ENGINE.

Specification of Letters Patent.

Patented Nov. 1, 1921.

Application led August 1, 1919. Serial No. 314,619.

To all L0 from t may concern Be it known that l, JOHN SoHoL'rz, a citizen of Austria, residing at Philadelphia, in

the county of Philadelphia and State of Pennsylvania, have invented certain new and useful Improvements in Gas-Engines, of which the following is a specification.

l\1y invention relates to gas engines and particularly to valve operating and controlling means for gas engines of the internal combustion type.

One object of my invention is to provide means for operating and controlling the exhaust valve of an interna-l combustion engine; said means being operative to quickly move the valve into a wide openjposition so as to permit of a rapid and thorough exhaust of the spent gases.

Another object is to make my invention of a simple and durable construction and so that it will be positive in its action.

These objects, and other advantageous ends which will be described hereinafter, I attain in the following manner, reference being had to the accompanying drawings in which- Figure 1 is a side elevation of a gas engine constructed in accordance with my invention and having my improved valve operating and controlling means thereon,

Fig. 2 is a top plan view of Fig. 1,

Fig. 3 is a fragmentary sectional plan view taken on the line 4-4 of Fig. 1, showing the exhaust valve in its closed position,

Fig. 4 is a view of similar nature to Fig. 3, showing said valve in its open position permitting the exhaust, and

Fig. 5 is a fragmentary sectional elevation taken on the line 6 6 of Fig. 3.

Referring to the drawings, 7 is a base preferably made in the form of a hollow metallic casing having a cylinder 8 secured thereto by bolts 9. The cylinder 8 has a piston 10 therein which is pivotally connected by a connecting rod 11 with a crank 12 on a shaft 13; said shaft being journaled within bearings 14 on the base 7. The shaft 13 at both sides of the bearings 14 has fly wheels 15 and 16 thereon, and an operating pulley 17 is mounted on the shaft 13 outside the fly wheel 15. A spark plug 18 is secured in the closed end of the cylinder 8 and operative to create a spark between the closed end of said cylinder and the piston 10 for the purpose of actuating the latter in the usual manner in a two cycle engine.

The cylinder 8 has a lateral extension 19 providing a chamber 2O into which a gas fuel pipe 21 extends, said chamber 20 communicatmg with the interior of the cylinder 8 adjacent the closed end 22. The extension 19 has a second chamber 23 which is normally cut off from'said chamber 20 by a valve 24, said valve 24 being adapted to engage a valve seat 25, as clearly shown in Fig. 3. The valve 24 has a stem 26 which is slidable through the extension 19 and is screw threaded at its outer end, as shown at 27, `said screw threaded end extending through a'hooked end 28 of a bar`29. Nuts 30 and 31 are screwed on the end 27 of the stem 26 and abut opposite faces ofthe hooked end 28 so that the hooked end 28 of the bar 29 is adjustably secured to the valve stem 26 and by loosening on either of the nuts 30 and 31 and tightening on the other, the end 28 can be adjusted to vary its position relatively to the valve 24.

A bracket 32 is secured to the base 7 by bolts 33; said bracket being substantially T-shape, as clearly shown in Fig. 5. The bracket 32 has stud bolts 34 which project outwardly from thearms 35 thereof and said stud bolts extend through elongated slots 36 and 37 in the bar 29, so that said bar is adapted to slide longitudinally in the direction of the length of 'the vvalve stem 26. A coiled spring 38 is interposed between the extension 19 and the nut 30 and operates to move and hold the valve 24 on the seat 25 and with thel ends 39 of the slots 36 and 37 adjacent the stud bolts 34. The end portion'40 of the bar 29 opposite the hooked end 28 is flared as shown in Fig. 5 and the outer edge 41 of the end 40 is made in the form of an arcuate projection, as clearly shown in Figs. 1 and 5. The shaft 13 has a gear wheel 42 secured thereon, said gear wheel meshing with another gear wheel 43 which is rotatably mounted on a stud shaft 44 on the base 7. The gears 43 and 42 are arranged two to one. In other words, it requires two revolutions of the gear 42 to impart one revolution to the gear 43. The gear 43 has a pin 45 projecting therefrom which has an anti-friction roller 46 thereon; the axis of said antifriction roller being eccentric to the center uate edge 41 of the flared end 40 of the bar 29 and thereby slide the bar 29 to eect the opening of the valve 24.

A carbureter 47, which forms a part of my co-pending application for United States patent, Serial No. 314,620, filed August 1st, 1919, is connected by a pipe 48I with the chamber 20 and serves to conduct fuel gas into the cylinder 8. The gear 43 has a contact' member 49 thereon adapted to engage a contact linger 50 on the base,

said contact finger being connected by an electric wire and in circuit with a generator, not illustrated, said generator also being connected by a wire 51 with the spark plug 18 to produce a spark and explode the gas within the cylinder to actuate the piston. The valve 24 will be opened Wide to rovide, a large outlet for the exhaust gas into the chamber 23., A perforated cap 53 is screwed into the top ofthe extension 19 and communicates with the chamber 23 so that the exhaust gases will pass outwardly through the perforations of the 'cap 53 to the atmosphere. If the valve seat or valve becomes Worn, this wear can be compensated for by changing the relative position of the hooked end 28 of the bar 29 on the valve stem 26. This adjustment can be made as previously stated by loosening one of the nuts 30 or 31 and tightening theother nut.

By having the anti-friction roller positioned as illustrated so as to engage the arcuate edge 41 initially in the position shown in dot-and-dash lines in Fig. 5, an extremely quick and comparatively great movement is imparted to the bar 29 and to theV valve 24 to quickly move the valve into its full Wide open position to permit the exhaust gases from the cylinder 8 to pass into the chamber 23 and out through the cap 53. It will be further noted that the center of the arc of the edge 41 is in line with the axis of the wheel 43 and'that the iiared portion 40 extends above and below the plane including the center of the arc of the edge 41 and the axis of the wheel 43. Thus the anti-friction roller operates on the edge 41 to permit a quick opening and closing of the valve 24.

IVhile I have described my invention as taking a particular form, it will be understood that the various parts of my invention may be changed without departing from the spirit thereof, and hence I do not limit myself to the precise construction setJ forth, but consider that I am at liberty to make such changes and alterations as fairly come with.

in the scope of the appended claim.

Having thus described my invention, what I claim as new land desire to secure by Letters Patent is An engine of the character described including an exhaust valve; a bar having slots and a hooked end; a stem on said valve having a screw threaded portion extending through said hooked end of the bar; nuts on said screw threaded end engaging opposite portions of the hooked end ofthe bar; a support having means extending through slots in said bar; means operatively connected to a movable part of the engine and operative to engage said bar and move the latter to open said valve; and means for moving said valve into a closed position as the bar is released by said operatively connected means; substantially as described.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses. Y

JOI-IN SCI-IOLTZ.

IVitnesses:

STANLEY A. BRozA, GUsTAvE SUNDAY. 

